/*

 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the Apache License 2.0 (the "License").  You may not use

 * this file except in compliance with the License.  You can obtain a copy

 * in the file LICENSE in the source distribution or at

 * https://www.openssl.org/source/license.html

 */

#include <stdio.h>

#include "internal/cryptlib.h"

#include <openssl/evp.h>

#include <openssl/objects.h>

#include <openssl/x509.h>

#include <openssl/pem.h>

int PEM_SignInit(EVP_MD_CTX *ctx, EVP_MD *type)

{

    return EVP_DigestInit_ex(ctx, type, NULL);

}

int PEM_SignUpdate(EVP_MD_CTX *ctx,

                   const unsigned char *data, unsigned int count)

{

    return EVP_DigestUpdate(ctx, data, count);

}

int PEM_SignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,

                  unsigned int *siglen, EVP_PKEY *pkey)

{

    unsigned char *m;

    int i, ret = 0;

    unsigned int m_len;

    m = OPENSSL_malloc(EVP_PKEY_get_size(pkey));

    if (m == NULL) {

        ERR_raise(ERR_LIB_PEM, ERR_R_MALLOC_FAILURE);

        goto err;

    }

    if (EVP_SignFinal(ctx, m, &m_len, pkey) <= 0)

        goto err;

    i = EVP_EncodeBlock(sigret, m, m_len);

    *siglen = i;

    ret = 1;

 err:

    /* ctx has been zeroed by EVP_SignFinal() */

    OPENSSL_free(m);

    return ret;

}